Sewing machine with base extension

ABSTRACT

A base member for converting a cylindrical base sewing machine into one having a flat base, said member including a built-in accessory drawer.

United States Patent Perlino 1 July 18, 1972 [s41 SEWING MACHINE WITHBASE [56] References Clted EXTENSION UNITED STATES PATEN'IS r 3,013,51412/1961 Stanton ..112/260 [72] Inventor: Silvano Perlino, Pavia, Italy343,774 6/1886 Moore ..312/330 X [73] Assignee: Necchl S.p.A., Pavia,Italy FOREIGN PATENTS ORAPPLlCATlONS [22] Filed: July 6,1970 1,189,9884/1970 Great Britain ..312/330 195,047 3/1938 Switzerland ...l12/260[21] APPI- 52,427 990,050 4/1965 Great Britain ..112/260 PrimaryExaminer-Jordan Franklin [30] Foreign A lj fl m m Data AssistantExaminer-George H. Krizmanich Attorney-Stevens, Davis, Miller & MosherJuly 21, 1969 Italy ..32415 A [57] ABSTRACT A base member for convertinga cylindrical base sewing mac nemto one avlnga at ase,sa1 mem rlncu mga[52] US Cl 112/258 hi h n b be l E Int. Cl- ..D05b builbin accessorydrawer.

Field oISearch ..112/258, 260, 217.1; 312/330,

JIIII/JIIHIII 5 Claims, 8 Drawing Figures Patented July 18, 19723,677,210

3 Sheets-Sheet l "INN" INVENTOR SILVANO PERLINO WQ MM ATTORNEYS PatentedJuly 18, 1972 3,677,210

3 Sheets-Sheet 5 19 g9 as 41 5 v .31 29 20 29 .30 J5 J3 J4 5 SEWINGMACHINE WITH BASE EXTENSION The present invention relates to cylindricalbase type sewing machines and specifically to a base extension thereforwhereby the cylindrical base is converted into a flat base.

An object of the invention is the realization of a simple and economicalmeans for realizing the aforementioned conversion and also for providingan accessory drawer in such a sewing machine.

V A specific advantage of the base member according to this invention isits simplicity of construction and consequent low cost relative toheretofore known analogous base members.

The objects of this invention generally are realized through theexpedient of using a bent sheet material upon which are provided guideand locking means for a drawer. Further, said guide and locking meansare realized through bending and shearing operations performed upon thesheet material.

In order to form the base member from a plate member upon which shearingoperations have been performed, successive bending operations areeffected to obtain:

a base having an upper wall which in turn has a first portion adapted tocome laterally adjacent to the upper wall of the sewing machinecylindrical base;

the base upper wall having a second portion adapted to register with thefree end of said cylindrical base, this second portion having a widthequal to the width of the first portion combined with the width of theupper wall of the cylindrical base;

a vertical surface connected with said upper wall and having a guidegroove along its entire lower lengthwise extent, for an accessorydrawer;

a second vertical surface as long as said upper wall second portion;

a lower horizontal wall as long as said upper wall second portion ofwhich it is a continuation;

a T-shaped groove centrally in said lower horizontal wall, previouslyformed by a shearing operation, which groove serves as a further guideand as a locking means for the accessory drawer which is fitted throughthe free end of the base member into the space defined between thevertical and horizontal walls of said member, a vertical wall of saiddrawer thereby closing the open end of said base member.

Not mentioned advantages and objects of the invention will be clearlyseen from the following description which is referred to theaccompanying drawings, wherein:

FIG. 1 is an isometric view of a sewing machine having the inventivebase attachment applied thereto;

FIG. 2 is an end elevation view of the inventive base attachment;

FIG. 3 is a plan view of the inventive base attachment showing the guideand locking means for the drawer;

FIG. 4 illustrates the drawer in its position for being removed from thebase attachment;

FIG. 5 illustrates the position of the drawer so that it may be pulledout to an open position without being detached from the base member;

FIGS. 6, 7, and 8 are respective detail views showing differentpositions of the guide means and the cooperating means on the drawer,corresponding respectively to the working positions illustrated in FIGS.3, 4, and 5.

Referring to the drawings, the machine base plate 10 supports themachine 11 which comprises in usual fashion a cylindrical horizontalbase 12 from which vertically extends a standard 13 which in turnsupports a horizontal upper arm 14 generally parallel to base 12. Asewing head 15 at the free end of arm 14 encloses the members whichdrive needle bar 16 and presser bar 17.

The present invention refers specifically to base attachment member 18which serves as a base extension member for converting the cylindricalbase l2 to a flat or planar base. Accessory drawer I9 is incorporatedwithin said extension member 18.

According to the preferred mode of realization as illustrated in thedrawings, the member 18 is of a plate material which has undergonesuccessive bending operations to present (see FIGS. 1 and 2) an upperwall 20 having two portions 21 and 22 of difierent width, a verticalwall 27, a lower wall 31, and a second vertical wall 32.

Side 23 of smaller width portion 21 lies adjacent to side 24 of thecylindrical base I2 when the base member is in working position, whilethe side 25 of the larger width portion 22 lies adjacent to end wall 26of the base 12. Portion 22 is equal to the combined widths of base 12and portion 21. A retaining element 40, in a known and not shown manner,locks the base member 18 to the base 12.

Vertical wall 27 (FIGS. 2, 3, 4, and 5) is faired into upper wall 20 andincludes a guide channel 28 along its entire lower lengthwise extent, inwhich channel a sliding member 29 is engaged. The sliding drawer member29 is located along the lower portion of the drawer l9 and forms acontinuation of the drawer vertical wall 30.

The other vertical wall 32 of the base member, which also is faired intoupper wall 20, continues along its lower extent to form the lower wall31 parallel to upper wall 20. Said lower wall 31 includes a T-shapedgroove 33 which serves as a further guide means and locking means forthe drawer l9. Said groove 33 is engaged by a first projection 34 on thelower wall 35 of the drawer I9 and further by a rectangular secondprojection 36 in said lower wall 35.

Said first projection 34 (FIGS. 3 to 8) comprises a rectangular web 37ending in a larger rectangular wing portion 38. Said root 37 and saidsecond projection 36 are both of lesser width than the groove 33 whilethe wing portion 38 is wider than the groove normally providedtherefore, a means adapted to couple drawer 19 to base member 18.

The wing portion 38, however, is smaller in cross-section than theenlarged end opening 39 of groove 33 so that the wing portion 38 can bedisengaged from the groove to enable complete detachment and removal ofthe drawer from the base member 18, as illustrated in FIGS. 4 and 8.

The second projection 36, which is longitudinally aligned with thegroove 33, falls into said groove and abuts against first wall 42thereof when the drawer is fully inserted into base member 18, andserves to prevent unwanted opening of said drawer, as by vibrationduring operation of the machine. In the fully closed position, end wall41 of drawer 19 serves to close the open end of the base member 18. Inorder to open the drawer it is only necessary to first lift the frontend thereof, as shown in FIG. 5, so as to lift projection 36 out ofgroove 33.

In order to completely detach and remove the drawer, it is onlynecessary to push it in all the way and to lift the rear end thereof, asshown in FIG. 4, so as to lift the wing portion 38 out of opening 39 ingroove 33. The drawer may then be pulled outwardly avoiding, however,any interference between projection 36 and the groove 33.

When the base member 18 is mounted on the sewing machine, the latchingmeans 40 engages a suitable, not shown, seat on cylindrical base 12while side 25 of upper wall portion 21 comes to rest against edge 24 ofthe base 12, and finally the entire lengthwise extent of channel 28rests against the upper surface of the machine base plate 10. v

Various details presented herein are of course merely exemplary of thepossible modes of realizing the inventive concept which can be realizedand applied to structural arrangements other than that illustratedherein.

I claim:

1. A sewing machine having a cylinder type horizontal base from whichupwardly extends the machine standard, a flat base plate, saidcylindrical base being supported upon the upper surface of flat baseplate, an extension member mountable upon said base plate and shaped soas to complement the contours of said cylindrical base, the uppersurface of said extension member forming a flat complementary surfaceextent of said cylindrical base, guide means formed in said extensionmember and a drawer slidably mounted on said means, said extensionmember being formed of a bendable sheet material and includingsuccessive walls bent perpendicularly to each other, and defining anopening at one end of the member, said guide means comprising a channelformed along the longitudinal extent of the corner formed between twomutually perpendicular walls of said extension member, a'firstprojection on said drawer fitted within said channel to slide therealongpursuant to sliding of said drawer in said extension member, said guidemeans further comprising a longitudinally extending slot cut out of saidsheet material, a second projection on said drawer lockingly engaged insaid slot, said drawer including an outer verticalwall whose peripheryconforms to that of said opening defined at an end of said extensionmember and through which said drawer is inserted into said member.

2. The machine of claim 1, a third projection on said drawer inlongitudinal alignment with said slot and engageable therewith andabuttable against an end wall thereof when the drawer is in fully closedposition, the drawer being liftable to discharge the third projectionfrom said slot whereby said drawer may be pulled outwardly from saidextension member.

3. The machine of claim 1, said second projection being T- shaped, theweb portion thereof being smaller than the width of said slot and thewing portion thereof being larger than the width of said slot wherebysaid second projection is free to slide longitudinally along said slotbut is arrested from vertical movement relative to said slot by saidwing portion abutting against the sides defining said slot.

4. The member of claim 3, one end ofsaid slot including an opening largeenough to permit vertical withdrawal of said second projection wingportion therethrough, the drawer being liftable in said member so as tolift said wing portion out of said slot through said opening.

5. The extension member of claim 4, said first projection comprising alongitudinally extending channel bent formed in said plate along acorner at which two walls of said member perpendicularly meet eachother, said drawer including a projection means slidably engageable insaid channel.

1. A sewing machine having a cylinder type horizontal base from whichupwardly extends the machine standard, a flat base plate, saidcylindrical base being supported upon the upper surface of flat baseplate, an extension member mountable upon said base plate and shaped soas to complement the contours of said cylindrical base, the uppersurface of said extension member forming a flat complementary surfaceextent of said cylindrical base, guide means formed in said extensionmember and a drawer slidably mounted on said means, said extensionmember being formed of a bendable sheet material and includingsuccessive walls bent perpendicularly to each other, and defining anopening at one end of the member, said guide means comprising a channelformed along the longitudinal extent of the corner formed between twomutually perpendicular walls of said extension member, a firstprojection on said drawer fitted within said channel to slide therealongpursuant to sliding of said drawer in said extension member, said guidemeans further comprising a longitudinally extending slot cut out of saidsheet material, a second projection on said drawer lockingly engaged insaid slot, said drawer including an outer vertical wall whose peripheryconforms to that of said opening defined at an end of said extensionmember and through which said drawer is inserted into said member. 2.The machine of claim 1, a third projection on said drawer inlongitudinal alignment with said slot and engageable therewith andabuttable against an end wall thereof when the drawer is in fully closedposition, the drawer being liftable to discharge the third projectionfrom said slot whereby said drawer may be pulled outwardly from saidextension member.
 3. The machine of claim 1, said second projectionbeing T-shaped, the web portion thereof being smaller than the width ofsaid slot and the wing portion thereof being larger than the width ofsaid slot whereby said second projection is free to slide longitudinallyalong said slot but is arrested from vertical movement relative to saidslot by said wing portion abutting against the sides defining said slot.4. The member of claim 3, one end of said slot including an openinglarge enough to permit vertical withdrawal of said second projectionwing portion therethrough, the drawer being liftable in said member soas to lift said wing portion out of said slot through said opening. 5.The extension member of claim 4, said first projection comprising alongitudinally extending channel bent formed in said plate along acorner at which two walls of said member perpendicularly meet eachother, said drawer including a projection means slidably engageable insaid channel.